Amanda's father, singer Paul Anka, revealed the news of his daughter's pregnancy to Entertainment Tonight Canada on Wednesday.
"I'm going to be a grandfather again," Paul said, going on to reveal that the couple would welcome "another baby girl" later this year.
Paul also praised his son-in-law, adding: "He's… a very smart boy, a wonderful guy for my daughter."
Horrible Bosses star Bateman married Amanda in 2001. They are already parents to 4-year-old Francesca Nora, who was born in October 2006.
Bateman has previously described Amanda as his "best friend" and admitted that he only wants to marry once in his life.
> Ten Things About... Jason Bateman
Watch Jason Bateman, Jason Sudeikis and Charlie Day discussing Horrible Bosses with Digital Spy below: